IBM System x3650 M4 Product Manual page 48

With 2 power supplies installed and 1 processor 130W or lower:

Maximum 12 DIMMs

No Quad rank RDIMMs, LRDIMM or HCDIMM

Maximum 4 PCIe adapters (including mezzanine cards) (if 4 adapters to be installed, one must be

a mezzanine card)
Maximum 16 drives

750W power supply restrictions
With 1 power supply installed and no GPU adapter is selected:

Maximum 24 DIMMs

No Quad rank RDIMMs, LRDIMM or HCDIMM

Maximum 4 PCIe adapters (including mezzanine cards) (if 4 adapters to be installed, one must be

a mezzanine card)
With 1 power supply installed and GPU adapters are selected:

Maximum 1 Quadro 4000, 6000 or K5000; or

Any quantity of Quadro 2000, K2000, 600

All other GPUs not supported

Processors up to 115W supported

Maximum 16 DIMMs

No Quad rank RDIMMs, LRDIMM or HCDIMM

Maximum 2 PCIe adapters (including mezzanine cards, excluding GPUs)

Maximum 8 drives

2 Quadro 4000 adapters supported with 2 power supply installed; 2 Quadro 6000 or K5000 adapters

not supported.
900W power supply restrictions:
With 1 power supply installed and no GPU adapter is selected, there is no restriction on drives,

memory, processors or adapters
With 1 power supply installed and certain GPU adapters are selected:

Maximum 1 Quadro 4000, 6000 or K5000; or

Any quantity of Quadro 2000, K2000, 600

Maximum 24 DIMMs

No Quad rank RDIMMs, LRDIMM or HCDIMM

Maximum 2 PCIe adapters (including mezzanine cards, excluding GPUs)

With 1 power supply installed and certain GPU adapters are selected:

Maximum 1 Tesla K20, Quadro K6000, Grid K2

Maximum 16 DIMMs

No Quad rank RDIMMs, LRDIMM or HCDIMM

Maximum 12 drives

Maximum 2 PCIe adapters (including mezzanine cards, excluding GPUs)

With 1 power supply installed and Tesla K40c is selected:

Maximum 16 DIMMs

No Quad rank RDIMMs, LRDIMM or HCDIMM

Maximum 10 drives

Maximum 2 PCIe adapters (including mezzanine cards, excluding GPUs)

With 2 power supplies installed and Tesla K40c is selected:

Maximum 10 drives

No restriction on memory and PCIe adapters

IBM System x3650 M4 48